I ride ISM saddles on all my bikes.
Bought many over the years. Have thousands and thousands of miles on them and many years. They are holding up well. I am not a light guy. They were not cheap but are genuine and have held up really well.

My buddy wanted one but did not like the price. So, off to Ebay he went. Got a Prologue realy cheap. Too good to be true cheap. He has less than a year on it and the foam is gone, like riding straight on the plastic base, the leather is separating from the shell where the foam is destroyed.

ISM told me the Prologue is highly counterfeited by the Chineese. It is a big problem.